<template>
  <div>
    <!-- 添加 编辑 删除 自己写 -->
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-button type="primary">添加角色</el-button>
      <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              :key="item1.id"
              v-for="(item1, i1) in scope.row.children"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <!-- 通过for 循环嵌套2级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      type="warning"
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- 整理代码 -->
            <!-- <pre>
                                 
                                 {{scope.row}}
                             </pre>
                          -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="chowSetRightDialog(scope.row)"
              >分配角色</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="提示"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 文字 -->
      <!-- data是渲染的东西 show-checkbox 是选中框 key是为每一个设置id all 是展开所有控件 -->

      <el-tree
        :data="rightslist"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
        :props="treeProps"
      >
      </el-tree>
      <!-- 底部 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配对话框的弹出
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 属性控件的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      // 树形控件默认勾选
      defKeys: [],
      // 选中的id
      roleId: "",
    };
  },
  created() {
    this.getRoleList();
  },
  mounted() {},
  methods: {
    // 获取角色列表的数据
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.$message.success("获取角色列表成功");
      this.rolelist = res.data;
      console.log(this.rolelist);
    },
    // 点击删除显示提示框
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该标签, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      // 如果确认了删除,则返回字符串 confirm
      // 如果取消了删除,则返回字符串 cancel
      console.log(confirmResult);

      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      console.log("确认了删除");
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      this.$message.success("删除权限成功");
      // 获取新的权限数据
      role.children = res.data;
    },
    // 获取权限数据
    async chowSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限的数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }
      this.$message.success("获取权限数据成功");
      this.rightslist = res.data;

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);
      // 关闭对话框
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有3级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前的node 节点不包含children属性，则是3级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedNodes(),
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      }
      this.$message.success("角色授权成功");
      this.getRoleList();
      this.setRightDialogVisible = false;
    },
  },
};
</script>

<style scoped lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #ccc;
}
.bdbottom {
  border-bottom: 1px solid #ccc;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
